CN103088253A - Non-oriented electrical steel plate and production method thereof - Google Patents
Non-oriented electrical steel plate and production method thereof Download PDFInfo
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Abstract
The invention discloses a non-oriented electrical steel plate. The non-oriented electrical steel plate comprises the following components in percentage by mass: more than or equal to 0.0060 percent of C, 1.10 to 1.30 percent of Si, 0.60 to 0.70 percent of Mn, more than or equal to 0.10 percent of P, more than or equal to 0.0080 percent of S, 0.20 to 0.50 percent of Als, and the balance of Fe and inevitable impurity elements. The invention also discloses a production method of the non-oriented electrical steel plate. By adopting the technical scheme, the non-oriented electrical steel plate with high magnetic strength, low iron loss and excellent performance is obtained; a manufacturing process for producing the non-oriented electrical steel plate with excellent performance through sheet billet continuous casting and rolling is adopted, so that a technical support for producing a non-oriented electrical steel plate with a higher grade and excellent environmental protection performance on a sheet billet continuous casting and rolling line is provided; and through subsequent acid cleaning and cold rolling and continuous annealing production, non-oriented electrical steel products with excellent performance are provided for the motor manufacturing industry in batches.
Description
Technical field
The invention belongs to the technical field that metallurgical industry is produced, relate to steel plate materials and production technology thereof.More particularly, the present invention relates to a kind of non-oriented electromagnetic steel sheet; In addition, the invention still further relates to the production method of this electrical sheet.
Background technology
Make the continuous casting and rolling technique of sheet bar of one of novel process as Iron And Steel Industry strip series products, obtained in recent years fast development at home and abroad.
But non-oriented electromagnetic steel sheet does not also have good technical scheme.Correspondingly, due to equipment configuration and the reason such as technique is immature, sheet billet continuous casting and rolling production line does not also have the Technology of the good electrical steel of production performance, and the electrical sheet of the excellent property of mass market urgent need can't be provided.
Summary of the invention
Problem to be solved by this invention is to provide a kind of non-oriented electromagnetic steel sheet of excellent property.
To achieve these goals, the technical scheme taked of the present invention is:
Non-oriented electromagnetic steel sheet provided by the present invention, alloying constituent comprise C, Si, Mn, P, S and Als, and all the other are Fe and inevitable impurity element;
The content of described alloying constituent is respectively by mass percentage: C≤0.0060%, Si:1.10～1.30%, Mn:0.60～0.70%, P≤0.10%, S≤0.0080%, Als:0.20～0.50%.
Specifically: the content of described alloying constituent is respectively by mass percentage: C:0.0034%; Si:1.19%; Mn:0.62%; P:0.081%; S:0.0022%; Als:0.26%; Perhaps, the content of described alloying constituent is respectively by mass percentage: C:0.0057%; Si:1.36%; Mn:0.69%; P:0.068%; S:0.0045%; Als:0.39%.
Another object of the present invention is to provide the production method of this steel plate.Described production method adopts CSP continuous casting and rolling technique of sheet bar production method.
Its concrete technical scheme is:
In described casting process, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15～30 ℃; Described casting process adopts sinusoidal mold oscillation curve, and described sinusoidal mold oscillation curve vibrational frequency is 260～300 times/min, and amplitude is 6～7mm, and pulling speed of continuous casting is controlled at 3.0～4.5m/min;
Described non-oriented electrical steel liquidus line is the solid-liquid phase height temperature curve of the molten steel that calculates according to the Fe-C-Si ternary phase diagrams under equilibrium state.
Described production method adopts hot rolling seven frame tandem mills;
Described continuous rolling process system is:
A, temperature schedule are: 1150 ± 20 ℃ of heating of continuous tunnel furnace, 1070 ± 30 ℃ of start rolling temperatures, 850～900 ℃ of finishing temperatures, 650～700 ℃ of coiling temperatures;
B, reduction system are: front two relative draft the 40～65%, the 3rd～5 relative draft the 30～45%, the 6th relative draft the 15～35%, the 7th relative draft of frame≤20% of frame of frame of frame of hot rolling seven frame tandem mills;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow.
Be cooled between described frame: high pressure spray nozzle is housed between frame, sprays water cooling;
Described laminar flow is cooled to: water effect by curved tube from water tank or header of low water head is formed without turn and pulseless stream thigh, and the liquid particle is without any phenomenon that mixes;
Adopt the stratiform current to roll rear on-line Control process for cooling to hot-rolled steel sheet or with what steel carried out, several laminar flow collectors are arranged on the top of finishing mill runoff table, form a cooling zone, accelerate cooling after hot-rolled steel plate by cooling zone.
A preferred technical scheme of the present invention is:
The content of described alloying constituent is respectively by mass percentage: C:0.0034; Si:1.19; Mn:0.62; P:0.081; S:0.0022; Als:0.26;
Described production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15 ℃;
Casting process adopts sinusoidal mold oscillation curve, 270 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.4mm, pulling speed of continuous casting is controlled at 4.2m/min;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1140 ℃ of heating of continuous tunnel furnace, 1050 ℃ of start rolling temperatures, 860 ℃ of finishing temperatures, 660 ℃ of coiling temperatures;
B, reduction system are: front two relative draft 45%, the 3～5 relative draft 35%, the 6 relative draft 15%, the 7 relative drafts 10% of frame of frame of frame of frame;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow; Hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of single-stand cold-rolling machine, enters follow-up continuous annealing+be coated with the insulation layer production line, produces the non-oriented electrical steel finished steel coils of excellent property.
Another preferred technical scheme of the present invention is:
The content of described alloying constituent is respectively by mass percentage: C:0.0057; Si:1.36; Mn:0.69; P:0.068; S:0.0045; Als:0.39;
Described production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+28 ℃;
Casting process adopts sinusoidal mold oscillation curve, 300 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.8mm, pulling speed of continuous casting is controlled at 3.3m/min;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1170 ℃ of heating of continuous tunnel furnace, 1090 ℃ of start rolling temperatures, 890 ℃ of finishing temperatures, 690 ℃ of coiling temperatures;
B, reduction system are: front 2 relative draft 60%, the 3～5 relative draft 40%, the 6 relative draft 30%, the 7 relative drafts 18% of frame of frame of frame of frame;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow; Hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of the reciprocating type cold-rolling mill of single chassis, enters follow-up continuous annealing+be coated with the insulation layer production line, produces the non-oriented electrical steel finished steel coils of excellent property.
The present invention adopts technique scheme, and the non-oriented electromagnetic steel sheet of a kind of high magnetic strength, low iron loss, excellent property is provided; The manufacturing process of the good non-oriented electromagnetic steel sheet of a kind of CSP production performance has also been proposed, for CSP line production non-oriented electrical steel hot rolling raw material more high-grade, that environmental-protecting performance is good provides technical guarantee, also further enlarge simultaneously the CSP handicraft product and made scope, and by follow-up pickling and cold-rolling and continuous annealing production, provide in batches the non-oriented electrical steel product of excellent property for downstream user motor manufacturing.
Embodiment
Description below by to embodiment is described in further detail the specific embodiment of the present invention, to help those skilled in the art, inventive concept of the present invention, technical scheme is had more complete, accurate and deep understanding.
In order to overcome the defective of prior art, realization provides the goal of the invention of the non-oriented electromagnetic steel sheet of excellent property, and the technical scheme that the present invention takes is:
Described non-oriented electromagnetic steel sheet, alloying constituent comprise C, Si, Mn, P, S and Als, and all the other are Fe and inevitable impurity element;
The content of described alloying constituent is respectively by mass percentage: C≤0.0060%, Si:1.10～1.30%, Mn:0.60～0.70%, P≤0.10%, S≤0.0080%, Als:0.20～0.50%.
Another object of the present invention is to provide the production method of this steel plate.Described production method adopts CSP continuous casting and rolling technique of sheet bar production method.
Its concrete technical scheme is:
In described casting process, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15～30 ℃; Described casting process adopts sinusoidal mold oscillation curve, and described sinusoidal mold oscillation curve vibrational frequency is 260～300 times/min, and amplitude is 6～7mm, and pulling speed of continuous casting is controlled at 3.0～4.5m/min;
Crystallizer protecting residue is MBG-1 type electrical steel mould flux.Its manufacturer is the new steel refractory Company in Xinyu, Jiangsu, and it is strong that this mould flux capacity of heat transmission is strong, few to the carburetting of molten steel, absorption is mingled with ability.
Described continuous rolling process system is:
A, temperature schedule are: 1150 ± 20 ℃ of heating of continuous tunnel furnace, 1070 ± 30 ℃ of start rolling temperatures, 850～900 ℃ of finishing temperatures, 650～700 ℃ of coiling temperatures;
B, reduction system are: front two relative draft the 40～65%, the 3rd～5 relative draft the 30～45%, the 6th relative draft the 15～35%, the 7th relative draft of frame≤20% of frame of frame of frame;
C, adopt the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow.
F1～F2 refers between the 1st and the 2nd rolling mill of hot rolling seven frame tandem mills; F2～F3 refers between the 2nd and the 3rd rolling mill of hot rolling seven frame tandem mills; High pressure spray nozzle is housed between frame, can sprays water cooling;
Laminar flow is cooling is exactly to make water effect by curved tube from water tank or header of low water head form an irrotationality and pulseless stream thigh, and from the appearance as transparent rod, the liquid particle is without any phenomenon that mixes for this stream thigh.The water of such laminar flow regime drops to the surface of steel plate meeting reposefully to the surrounding diffluence from certain altitude, thereby has enlarged the effective contact of water coolant with sheet material, has greatly improved cooling efficiency.The cooling characteristics of laminar flow are that the flow range of cooling apparatus is certain basically.Adopt the stratiform current to roll rear on-line Control process for cooling to hot-rolled steel sheet or with what steel carried out, several laminar flow collectors are arranged on the top of finishing mill runoff table, form a cooling zone, accelerate cooling after steel plate or Band by Hot-rolling by cooling zone.
the invention provides the non-oriented electromagnetic steel sheet of above-mentioned excellent property, it has possessed high magnetic strength, the performance of low iron loss, compared with prior art, the present invention has proposed the manufacturing process of the good non-oriented electromagnetic steel sheet of a kind of CSP production performance first, the non-oriented electrical steel hot rolling raw material good for the more high-grade environmental-protecting performance of CSP line production provides technical guarantee, also further enlarge simultaneously the CSP handicraft product and made scope, and by follow-up pickling and cold-rolling and continuous annealing production, provide in batches the non-oriented electrical steel product of excellent property to be used for downstream user motor manufacturing.
The invention provides following two exemplifying embodiments, the content of its alloying constituent is as shown in following table 1.
Table 1: the electrical steel composition of steel (quality %) of excellent property
| C | Si | Mn | P | S | Als | |
| Embodiment one | 0.0034 | 1.19 | 0.62 | 0.081 | 0.0022 | 0.26 |
| Embodiment two | 0.0057 | 1.36 | 0.69 | 0.068 | 0.0045 | 0.39 |
Embodiment one:
Press the embodiment one in table 1, its production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15 ℃;
Casting process adopts sinusoidal mold oscillation curve, 270 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.4mm, pulling speed of continuous casting is controlled at 4.2m/min, and crystallizer protecting residue is MBG-1 type electrical steel mould flux;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1140 ℃ of heating of continuous tunnel furnace, 1050 ℃ of start rolling temperatures, 860 ℃ of finishing temperatures, 660 ℃ of coiling temperatures;
B, reduction system are: relative draft 45%, the 3～5 relative draft 35%, the 6 relative draft 15%, the 7 relative draft 10% of frame of frame of frame of the first two frame;
C, adopt the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow, hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of single-stand cold-rolling machine, enters follow-up continuous annealing+be coated with the insulation layer production line, produces the non-oriented electrical steel finished steel coils of excellent property.
Embodiment two:
Press the embodiment two in table 1, its production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+28 ℃;
Casting process adopts sinusoidal mold oscillation curve, 300 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.8mm, pulling speed of continuous casting is controlled at 3.3m/min, and crystallizer protecting residue is MBG-1 type electrical steel mould flux;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1170 ℃ of heating of continuous tunnel furnace, 1090 ℃ of start rolling temperatures, 890 ℃ of finishing temperatures, 690 ℃ of coiling temperatures;
B, reduction system are: relative draft 60%, the 3～5 relative draft 40%, the 6 relative draft 30%, the 7 relative draft 18% of frame of frame of frame of the first two frame;
C, adopt the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow, hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of the reciprocating type cold-rolling mill of single chassis, enters follow-up continuous annealing+be coated with the insulation layer production line, produces the non-oriented electrical steel finished steel coils of excellent property.
The finished product magnetic property of the non-oriented electromagnetic steel sheet of the excellent property in above-mentioned two embodiment reaches with the contrast of prior art sees following table 2.
Table 2: the electrical steel steel plate magnetic property of excellent property
| Thickness (mm) | P 1.5/50（W/kg） | B 50（T） | |
| Prior art | 0.5 | 3.90～4.20 | 1.69～1.73 |
| Embodiment 1 | 0.5 | 3.826 | 1.741 |
| Embodiment 2 | 0.5 | 3.689 | 1.746 |
The mechanical property of the non-oriented electromagnetic steel sheet of the excellent property in above-mentioned two embodiment is seen following table 3.
Table 3: the electrical steel mechanical property of steel plate of excellent property
| Rp0.2（MPa） | Rm（MPa） | A 50?（%） | HV1 | |
| Embodiment 1 | 275 | 394 | 34.0 | 125 |
| Embodiment 2 | 283 | 411 | 33.1 | 131 |
Above the present invention is exemplarily described; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (9)
1. non-oriented electromagnetic steel sheet, alloying constituent comprises C, Si, Mn, P, S and Als, all the other are Fe and inevitable impurity element, it is characterized in that:
The content of described alloying constituent is respectively by mass percentage: C≤0.0060%, Si:1.10～1.30%, Mn:0.60～0.70%, P≤0.10%, S≤0.0080%, Als:0.20～0.50%.
2. according to non-oriented electromagnetic steel sheet claimed in claim 1, it is characterized in that: the content of described alloying constituent is respectively by mass percentage:
C：0.0034%；Si：1.19%；Mn：0.62%；P：0.081%；S：0.0022%；Als：0.26%。
3. according to non-oriented electromagnetic steel sheet claimed in claim 1, it is characterized in that: the content of described alloying constituent is respectively by mass percentage:
C：0.0057%；Si：1.36%；Mn：0.69%；P：0.068%；S：0.0045%；Als：0.39%。
4. according to the production method of claim 1 or 2 or 3 described non-oriented electromagnetic steel sheets, it is characterized in that: described production method adopts CSP continuous casting and rolling technique of sheet bar production method.
5. according to the production method of non-oriented electromagnetic steel sheet claimed in claim 4, it is characterized in that: in described casting process, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15～30 ℃; Described casting process adopts sinusoidal mold oscillation curve, and described sinusoidal mold oscillation curve vibrational frequency is 260～300 times/min, and amplitude is 6～7mm, and pulling speed of continuous casting is controlled at 3.0～4.5m/min;
Described non-oriented electrical steel liquidus line is the solid-liquid phase height temperature curve of the molten steel that calculates according to the Fe-C-Si ternary phase diagrams under equilibrium state.
6. according to the production method of non-oriented electromagnetic steel sheet claimed in claim 4, it is characterized in that:
Described production method adopts hot rolling seven frame tandem mills;
Described continuous rolling process system is:
A, temperature schedule are: 1150 ± 20 ℃ of heating of continuous tunnel furnace, 1070 ± 30 ℃ of start rolling temperatures, 850～900 ℃ of finishing temperatures, 650～700 ℃ of coiling temperatures;
B, reduction system are: front two relative draft the 40～65%, the 3rd～5 relative draft the 30～45%, the 6th relative draft the 15～35%, the 7th relative draft of frame≤20% of frame of frame of frame of hot rolling seven frame tandem mills;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow.
7. according to the production method of non-oriented electromagnetic steel sheet claimed in claim 6, it is characterized in that:
Be cooled between described frame: high pressure spray nozzle is housed between frame, sprays water cooling;
Described laminar flow is cooled to: water effect by curved tube from water tank or header of low water head is formed without turn and pulseless stream thigh, and the liquid particle is without any phenomenon that mixes;
Adopt the stratiform current to roll rear on-line Control process for cooling to hot-rolled steel sheet or with what steel carried out, several laminar flow collectors are arranged on the top of finishing mill runoff table, form a cooling zone, accelerate cooling after hot-rolled steel plate by cooling zone.
8. according to the production method of non-oriented electromagnetic steel sheet claimed in claim 1, it is characterized in that: the content of described alloying constituent is respectively by mass percentage: C:0.0034; Si:1.19; Mn:0.62; P:0.081; S:0.0022; Als:0.26;
Described production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+15 ℃;
Casting process adopts sinusoidal mold oscillation curve, 270 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.4mm, pulling speed of continuous casting is controlled at 4.2m/min;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1140 ℃ of heating of continuous tunnel furnace, 1050 ℃ of start rolling temperatures, 860 ℃ of finishing temperatures, 660 ℃ of coiling temperatures;
B, reduction system are: front two relative draft 45%, the 3～5 relative draft 35%, the 6 relative draft 15%, the 7 relative drafts 10% of frame of frame of frame of frame;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow; Hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of single-stand cold-rolling machine, enters follow-up continuous annealing+be coated with the insulation layer production line, produces excellent property non-oriented electrical steel finished steel coils.
9. according to the production method of non-oriented electromagnetic steel sheet claimed in claim 1, it is characterized in that: the content of described alloying constituent is respectively by mass percentage: C:0.0057; Si:1.36; Mn:0.69; P:0.068; S:0.0045; Als:0.39;
Described production method adopts CSP continuous casting and rolling technique of sheet bar production method, and its processing method is as follows:
First through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at non-oriented electrical steel liquidus line+28 ℃;
Casting process adopts sinusoidal mold oscillation curve, 300 times/min of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.8mm, pulling speed of continuous casting is controlled at 3.3m/min;
After the continuous tunnel furnace soaking, enter seven frame tandem mill groups rolling, the continuous rolling process system is:
A, temperature schedule are: 1170 ℃ of heating of continuous tunnel furnace, 1090 ℃ of start rolling temperatures, 890 ℃ of finishing temperatures, 690 ℃ of coiling temperatures;
B, reduction system are: front 2 relative draft 60%, the 3～5 relative draft 40%, the 6 relative draft 30%, the 7 relative drafts 18% of frame of frame of frame of frame;
Cooling between the frame of c, employing hot rolling seven frame tandem mills; Secondary descaling steel between the milling train of the 1st and the 2nd frame of hot rolling seven frame tandem mills, between the milling train of the 2nd and the 3rd frame; It is cooling that back segment is cooled to laminar flow; Hot rolling thickness specification 2.2mm;
Hot rolled coil is through the rolling chill volume that becomes 0.5mm of the reciprocating type cold-rolling mill of single chassis, enters follow-up continuous annealing+be coated with the insulation layer production line, produces excellent property non-oriented electrical steel finished steel coils.
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| CN103468907A (en) * | 2013-09-18 | 2013-12-25 | 济钢集团有限公司 | Method for producing cold-rolled non-oriented electrical steel based on ASP (AnGang Strip Production) medium thin slab continuous casting and rolling process |
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| CN112030059A (en) * | 2020-08-31 | 2020-12-04 | 武汉钢铁有限公司 | Short-process production method of non-oriented silicon steel |
| CN112030059B (en) * | 2020-08-31 | 2021-08-03 | 武汉钢铁有限公司 | Short-process production method of non-oriented silicon steel |
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Application publication date: 20130508 |